*{
    margin: 0;
    padding: 0;
}
.box{
    max-width: 1090px;
    height: 640px;
    margin: 0 auto;
}
.top-title{
    width: 115px;
    height: 40px;
    background-color: #2dae36;
    text-align: center;
    line-height: 40px;
    color: white;
    border-top-left-radius: 15px;
    border-bottom-right-radius: 15px;
}
.content{
    max-width: 1090px;
    height: 600px;
    border-top: 1px solid #2dae36;
    overflow: hidden;
}
.content div{
    width: 343px;
    height: 260px;
    float: left;
    margin-top: 25px;
}
.content div:not(:first-child){
    margin-left: 20px;
}
.content div:not(:nth-child(4)){
    margin-left: 20px;
}
img{
    width: 343px;
    height: 260px;
}

@media (max-width:768px){
    .content div{
        width: 100%;
    }
}
@media (min-width:768px) and (max-width:1030px){
    .content div{
        width: 40%;
    }
}